Upgrade userfaultfd-sys to 0.5.0 am: f1ac6acd0b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/userfaultfd-sys/+/2878121

Change-Id: I1c264bfdabbcec77eb168840df4e92439a1c84dd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>